

Did someone looked at the military capabilities of the EU compared to the US? No? It thought so…
If you are a vassal (and - at least for now - we, the EU are) its better to appease your lord. A docile ruler is easier to topple than one who fears you plan something funny…


The answer is: Military
At the moment Europe is very much dependent on the US if there is really a bigger conflict on the horizon, and i bet Trump did not hesitate to play this card.